Features

Sampler for aldehydes etc. for an indoor environment.

Legal regulations and background

Various acts (*) stipulate the formaldehyde concentration in the air inside a new or reformed building to be less than the Ministry of Health, Labour and Welfare guidance value (< 80 ppb).

※Housing Quality Assurance Act (August 2001)
※Act on Maintenance of Sanitation in Buildings (April 2003)

※Building Standards Act (July 2003)
Conventionally, precise measurement of formaldehyde concentration was commonly conducted by derivatizing and capturing it by 2,4-Dintrophenylhydrazine (DNPH), and quantifying the derivative by high performance liquid chromatography (HPLC). This DNPH and its aldehyde derivatives have adverse health effects on human such as mutagenicity. As a method to solve such health issues, SCAS developed the aldehyde capture sampler CNET-A and CNET-P. They are samplers using (4-cyano-2-ethoxybenzyl)hydroxylamine (CNET) as the capturing agent that reacts with aldehydes (ketones).

Principle: Reaction formula between CNET and aldehydes (ketones)

Product lineup

SUMICATCH CNET-A (active sampler)

This is an active sampler for aldehydes etc. in the environmental air.
・Able to accurately measure acrolein and crotonaldehyde.

This sampler and a pump (separately sold) are needed to use SUMICATCH CNET-A. Make sure to apply an ozone scrubber and protect from the sunlight (e.g., covering with aluminum foil) when collecting the air outdoors.